Studies on H+-Translocating ATPases in Plants of Varying Resistance to Salinity

Studies on H-Translocating ATPases in Plants of Varying Resistance to Salinity : II. K Strongly Promotes Development of Membrane Potential in Vesicles from Cotton Roots.

Mg(2+)-ATP-dependent H(+)-translocation has been studied in membrane vesicles derived from the roots of Gossypium hirsutum L. var. Acala San Jose 2. Establishment of a positive membrane potential was followed by measuring SCN(-) accumulation; establishment of DeltapH across the vesicle membranes by measuring quinacrine fluorescence quenching. High specificity for ATP was shown, and H(+)-translo...

VACUOLAR-TYPE H+-TRANSLOCATING ATPases IN PLANT ENDOMEMBRANES: SUBUNIT ORGANIZATION AND MULTIGENE FAMILIES.

Acidification of endomembrane compartments by the vacuolar-type H+-translocating ATPase (V-ATPase) is vital to the growth and development of plants. The V-ATPase purified from oat roots is a large complex of 650x10(3 )Mr that contains 10 different subunits of 70, 60, 44, 42, 36, 32, 29, 16, 13 and 12x10(3 )Mr. This set of ten polypeptides is sufficient to couple ATP hydrolysis to proton pumping...

Fluoride inhibition of proton-translocating ATPases of oral bacteria.

The ATPases of isolated membranes of lactic acid bacteria were found to be inhibited by fluoride in a complex manner. Among the enzymes tested, that of Streptococcus mutans GS-5 was the most sensitive to fluoride, and the initial rate of hydrolysis of ATP was reduced 50% by approximately 3 mM fluoride. The enzyme of Lactobacillus casei ATCC 4646 was the most resistant, and about 25 mM fluoride ...

Adaptation of Plants to Salinity

Studies on Ethnobotany of important medicinal plants in Sistan.

Background & Aim: Medicinal plants, Since time immemorial, have been used in virtually all cultures as a source of medicine and ethnobotany has prevent to be a valuable method to find new herbal medicine and plant derived drugs. Material & Methods: This study determined medicinally important plants that are most frequently by the local inhabitants of Sistan to treat human diseases. In current ...